package com.util;

import java.security.MessageDigest;


/**
 * MD5工具类
 * @ClassName MD5Util
 * @Description TODO
 * @author daijinchi
 */
public class MD5Util {
	
	private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
		    "6", "7", "8", "9", "a", "b", "c", "d", "e", "f","A","B","C","D","F","E","G","H","I","J","K" };
	
	private static String byteArrayToHexString(byte b[]) {
		StringBuffer resultSb = new StringBuffer();
		for (int i = 0; i < b.length; i++)
			resultSb.append(byteToHexString(b[i]));

		return resultSb.toString();
	}

	private static String byteToHexString(byte b) {
		int n = b;
		if (n < 0)
			n += 256;
		int d1 = n / 16;
		int d2 = n % 16;
		return hexDigits[d1] + hexDigits[d2];
	}

	public static String MD5Encode(String origin) {
		String resultString = null;
		try {
			resultString = new String(origin);
			MessageDigest md = MessageDigest.getInstance("MD5");
				resultString = byteArrayToHexString(md.digest(resultString
						.getBytes()));

		} catch (Exception ex) {
			 ex.printStackTrace();
		}
		return resultString;
		
	}
	
	public static void main(String[] args) {
		String dd=MD5Util.MD5Encode("admin");
		System.out.println(dd);
	}
}
